Chaeles e



(Model.)

C. E. WHITTLESEY.

LOCK.

No. 320,521. Patented June 23, 1885.,

Illini!! l WITNESSES INVBNTOR @uw ATTORNEY N PETERS. IMMO-maw, wnhingicm l.)V C- UNITED STATES PATENT OEErcE..

CHARLES E. \VHITTLESEY, OF NEV HAVEN, CONNECTICUT, ASSIGNOR OF ONE-HALF TO HENRTT T. PECK, OF SAME PLACE.

LOCK.

SPEClFICATION forming part of Letters Patent No. 320,521, dated June 23, 1885;

Application filed February 4, 1885.

T all whom, it may concern:

Be it known that I, CHARLEs E. WHITTLE- sEY, a citizen of the United States, residing at New Haven, in the county of New Haven and State of Connecticut, 'have invented a new and useful Door-Lock, of which the following is a Fig. l on the line x w.

specification.

My invention relates to a new and improved door-lock, and has for its object to provide a lock adapted to bolt and unbolt only by a pe culiar and methodical movement of the key.

The invention consists, essentially, of reci procal bolts arranged and operated as hereinafter more fully described and claimed.

In the drawings, Figure 1 is an elevation of my improved lock with the face-plate removed, showing the interior. Fig. 2 is a section of Fig. 3 is an elevation of the interior of the lock, showing the parts locked. Fig. 4 is a section on the line x x of Fig. 3. Fig. 5 is an elevation of the interior, showing the parts unlocked. Fig. 6 is a view of the cylinder. Fig. 7 is a view of the spindle, and Fig. 8 is a View of the spring.

Arepresents the case of thelock, of ordinary box form, secured at one end to a flange, B, by which it is fastened to the door as a mortiselock.

A flat plate, C, forms a cover for the case, and is held together by means of a screw tting a threaded perforation in a projection, d, raised on the case.

Arranged lengthwise within the ease are two bolts, e e', of the same length as the case and placed parallel to each other. One of the bolts is located above and the other below the center of the ease, and each is out away on the side toward the center, so as to leave a space between them. On the inner side of each bolt V-shaped notches ff are formed. rlhe notches are in the same relative position in their respective bolts, and are thus opposite to each other. v

For a purpose hereinafter set forth the upper bolt, e, is cut away around the notch f, as shown by the dotted line g, so that in this part the bolt is thinner than thelower bolt; but in every other respect the two bolts are of like dimensions.

Arranged in the space between the bolts is 1 (Mode-l.;

a perforated cylinder, h., the ends of which bear in corresponding round holes, L Zr, in the case A and its cover C.

Diametrically opposite on the periphery of the cylinder h are arms Z Z', which are re- 55 ceived in the notches f f in the bolts.

It is evident that the cylinder h, with its two opposite arms ZZ', fornisalever fulcrumed at its center and engaged at its ends with the bolts.

' The perforation in the cylinder is rectangular, and receives a similar-shaped bar or spindle, m, by which the cylinder is turned.

On that side of the lock intended for the outside when in the door the spindle m is made iiush with the end of the cylinder, and has two radial projections, n a, which tit corresponding grooves or notches, a a', in the cylinder, and prevent the spindle from being pushed through the cylinder from that side. On the 7@ opposite side of the lock the spindle projects sufficiently to receive an ordinary door-knob.

There is a key-slot, P, in that end of the spindle which is flush with the end of the cylinder. The key-slot, as shown, is a simple straight slot; but it is evident that it may be formed in various intricate shapes, requiring corresponding complex keys.

On the side of the case A is fastened a spring, r, of the form shown. The annular so part of the spring encircles the cylinder and bears against the arms or teeth Z Z, and presses the cylinder toward the cover of the case.

The armsl Z are not as wide as the space between the lock-case and its cover, and the eyl- S 5 inder can move correspondingly across the case.

The spring r throws the arms against the cover of the case, and pressure on a key inserted in the key-slot l? pushes the cylinder 9o toward the back of the case.

The surface of the upper bolt, e, is cut away on the side toward the back of the case, and is not as thick as the bolt e. Pressure on the key throws the arm Z out of the notch f and disengages the arm from the bolt.

Constructed as above described, the operation of my lock is as follows: As the key is turned in either direction, one of the bolts ec is thrust out and the other withdrawn, and roo the door remains bolted; but when the key is pressed sufficiently the cylinder -is pushed toward the back ofthe case, and the arm Z is depressed and swings under the bolt e.

To unlock the door, the bolt eis first thrust out. The cylinder is then pressed toward the back of the case, disengaging the arm Zfrom the bolt e. Movement of the key in the opposite direction, pressure being meanwhile exerted on the key, thrusts out the bolt e', and the door is locked by both bolts. Turning the key without pushing the cylinder back thrusts one bolt out and draws the other in, but does not unlock the door.

To unlock the door, the bolt e may be first withdrawn and the arm Z then disengaged from the lock, when the reverse motion of the key withdraws the bolt e', and the door is unlocked.

What I claim as new, and desire to secure by Letters Patent, is-

l. ln a door-lock, the combination, with a bolt, and the spindle m, all arranged and op- 35 erated in the manner and for the purpose described.

CHARLES E. VHITTLESEY.

Vi tn esses:

EARLLIss P. ANINE, EDWIN C. DON. 

